package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioPorperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {
    @Autowired
    private MinioClient minioClient;
    @Autowired
    private MinioPorperties porperties;

    @Override
    public String upload(MultipartFile file)
            throws ServerException, InsufficientDataException, ErrorResponseException,
            IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException,
            XmlParserException, InternalException {
        // 判断桶是否存在
        boolean bucketExists = minioClient.bucketExists(
                BucketExistsArgs.builder().bucket(porperties.getBucketName()).build());
        if (!bucketExists) {
            // 不存在时创建桶
            minioClient.makeBucket(
                    MakeBucketArgs.builder().bucket(porperties.getBucketName()).build());
            // 设置桶权限
            minioClient.setBucketPolicy(
                    SetBucketPolicyArgs.builder()
                            .bucket(porperties.getBucketName())
                            .config(createBucketPolicyConfig(porperties.getBucketName()))
                            .build()
            );
        }
        // 生成唯一文件名
        String filename =
                new SimpleDateFormat("yyyyMMdd").format(new Date())
                        + "/"
                        + UUID.randomUUID()
                        + "-"
                        + file.getOriginalFilename();
        // 将图片上传到minio服务器中
        minioClient.putObject(
                PutObjectArgs.builder()
                        .bucket(porperties.getBucketName())
                        .stream(file.getInputStream(), file.getSize(), -1)
                        .object(filename)
                        .contentType(file.getContentType())
                        .build()
        );
        return String.join("/", porperties.getEndpoint(), porperties.getBucketName(), filename);
    }

    private String createBucketPolicyConfig(String bucketName) {

        return """
            {
              "Statement" : [ {
                "Action" : "s3:GetObject",
                "Effect" : "Allow",
                "Principal" : "*",
                "Resource" : "arn:aws:s3:::%s/*"
              } ],
              "Version" : "2012-10-17"
            }
            """.formatted(bucketName);
    }
}
